Open in-app billing plugin enables Unity developers to reduce in-app purchases integration and maintenance time.  The plugin uses one common interface for 3 mobile platforms: Android, iOS and Windows Phone 8. Supported Stores: Android (Google Play, Amazon Appstore, Yandex.Store, Samsung Apps, Nokia Store,  SlideMe, Appland, Apptoide, AppMall),  iOS:Apple Store, Windows Phone Store) It’s based on OpenIAB library developed by One Platform Foundation team.